modern RT target volumes, doses in NHL, hematological malignancies, radiation therapy, resurgence, solid and hematologic malignancies, definitive RT, consolidation RT post-chemotherapy, survival time, IMRT/VMAT, DIBH techniques, proton availability, ILROG guidelines, nodal Non-Hodgkin Lymphoma, ILROG steering committee, 2-D to 3-D planning, modern imaging, RT delivery, Treatment Volume Principles, ICRU report 83, localized indolent lymphoma, aggressive lymphomas, combined-modality approach, volume of interest delineation, head and neck, axilla, prechemotherapy GTV, CTV determination, ITV, internal target volume, determination of PTV, reduced dose radiotherapy, 24 Gy standard of care in indolent lymphomas, 30-45 Gy standard for aggressive lymphomas, extranodal nasal type NK/T cell lymphoma, principles of treatment and risk-adapted therapy, ENKTCL, concurrent chemo-radiotherapy, radio-sensitization of tumor and normal tissues, prophylactic radiation, Waldeyer's ring ENKTCL, non-nasal UADT ENKTCL, high-risk subclinical region of ENKTCL, orbital (ocular adnexal) lymphomas: MZL, orbital (ocular adnexal) lymphomas: DLBL, DLBCL, extranodal lymphomas